The sweet alyssum has tiny flowers that attract delicate beneficial insects, such as predatory wasps. The damage the leafminers do to radish leaves doesn't prevent the radishes from growing nicely underground. Planting radishes among your spinach will draw leafminers away from the healthy greens. Play icon The triangle icon that indicates to play Radishes and Spinach Nicotiana (flowering tobacco) and cleome (spider flower) give lettuce the light shade it grows best in. The vines can also climb up the corn stalks. The beans attract beneficial insects that prey on corn pests such as leafhoppers, fall armyworms, and leaf beetles. The cabbages support the floppy dill, while the dill attracts the helpful wasps that control cabbage worms and other pests. "Dill is a great companion for cabbage family plants, such as broccoli and brussels sprouts," Cunningham says. Just be careful to remove the flowers before the weeds set seed.
Leafminers preferred both pigweed (also called amaranthus) and ragweed to pepper plants in a study at the Coastal Plains Experiment Station in Tifton, Georgia. Nasturtiums reputedly repel cucumber beetles, but they can also serve as a habitat for predatory insects like spiders and ground beetles. The nasturtium's vining stems make them a great companion rambling among your growing cucumbers and squash plants, suggests Sally Jean Cunningham, master gardener and author of Great Garden Companions. Tomatoes repel diamondback moth larvae, which can chew large holes in cabbage leaves. Marigolds and MelonsĬertain marigold varieties control nematodes in the roots of melon without using chemical treatments. Garlic chives are probably just as repellent, and their small purple or white flowers in late spring look great with rose flowers and foliage. Gardeners have been planting garlic with roses for eons since the bulbs can help to repel rose pests. These combinations of plants do way better, together: Roses and Garlic
Plants can repel harmful organisms or lure the bad bugs away from more delicate species.
Some couplings also prevent pest problems.
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